Recently, I've been experiencing some downtime for my website www.nexttwist.com.
The downtime is intermittent and it may be up at one location while it is down in another physical location. For some users, when they change the DNS to 188.8.131.52 in their system, they've reported that it came back.
I then had a look into my DNS settings at http://www.intodns.com/nexttwist.com and found the errors (attached image):
I don't know if the error as shown is responsible for the downtime but can anyone explain me how to fix these errors?